PD500 @ The National Valve Museum [Datasheet] The PD500 is listed as an output valve for television line scan, but Mullard describe the PD500 as: a shunt stabiliser triode for colour television. It would be unusual for a line scan output valve to be a triode and have a low current rating. As a regulator of the EHT voltage it makes perfect sense. http://www.r-type.org/exhib/aah0027.htm |